ford engine v-6 block. fort sent this to us. us.ord sent this to it's an actual model for a six cylinder engine that i scaled down and made on my maker bot. i'm a total gearhead. i love this model. i love engines. i have taken engines apart and put them back together, but i've never seen the inside of an engine because i would have to sought in half -- saw it in half and it's made of iron, right? but on my maker bot, i can see all the different laces, where . getting a maker bot is also educational. how things are made, and the manufacturing process, and in the world around them. >> are you the inventor? >> you can blame me. >> where did you come up with the idea? >> 3-d printers have been around for 25 years, but they were mainframe sized machines that were really expensive. i wanted one, but i couldn't afford one. some friends and i got together and we started tinkering. when it worked, we quit our jobs and started maker bot so everyone could have one of these. the founder of maker bot, ceo of the maker bot corporation out of